Workpiece edge and corner locating tool

ABSTRACT

A gauge body defining a reference axis and including first, second and third abutments disposed in and spaced about a 180 degree sector extending about the reference axis. The first and second abutments are disposed on opposite sides of the axis and include corresponding abutment surfaces facing in the same direction disposed in a diametric plane of the reference axis and the adjacent sides of the third abutment and one of the other abutments are disposed in radial planes of the reference axis angularly displaced 45* apart while the opposing surfaces of the third abutment and the other of the first and second abutments are disposed in radial planes of the reference axis angularly displaced 90* apart. Also, a fourth abutment is provided and is spaced generally radially of the reference axis from the third abutment and includes remote side surfaces contained in the same radial planes of the reference axis in which the opposite side surfaces of the third abutment are disposed.

ited States Patent [191 Streander Jan. 15, 1974 WORKPIECE EDGE ANDCORNER LOCATING TOOL [75] Inventor: George W. Streander, Alamogordo,

N. Mex.

[73] Assignee: Design SYSTEMS, Inc.,

Alamogordo, N. Mex.

221 Filed: Oct. 21, 1971 21 Appl.No.: 191,187

[52] US. Cl. 33/169 R, 33/180 R [51] Int. Cl, G0lb 5/25 [58] Field ofSearch 33/180 R, 189 R,

33/169 R, 174 S, 42, 43, 41 E [56] References Cited OTHER PUBLICATIONSAmerican Machinist; August 30, 1965, pg. 104.

Primary ExaminerLouis R. Prince Assistant ExaminerCharles E. PhillipsAttorney-Harvey B. Jacobson 5 7] ABSTRACT A gauge body defining areference axis and including first, vsecond and third abutments disposedin and spaced about a 180 degree sector extending about the referenceaxis. The first and second abutments are disposed on opposite sides ofthe axis and include corresponding abutment surfaces facing in the samedirection disposed in a diametric plane of the reference axis and theadjacent sides of the third abutment and one of the other abutments aredisposed in radial planes of the reference axis angularly displaced 45apart while the opposing surfaces of the third abutment and the other ofthe first and second abutments are disposed in radial planes of thereference axis angularly displaced 90 apart. Also, a fourth abutment isprovided and is spaced generally radially of the reference axis from thethird abutment and includes remote side surfaces contained in the sameradial planes of the reference axis in which the opposite side surfacesof the third abutment are disposed.

12 Claims, 6 Drawing Figures Pmmmmv m 3.7%.05?

Fig.2

George W S/reanoer 1 WORKPIECE EDGE AND CORNER LOCATING TOOL The tool ofthe instant invention has been specifically designed to provide a meanswhereby machinists, tool and die makers, mechanics and all personsconcerned with the proper alignment of their work may locate a referenceedge or surface of a workpiece even if the edge or surface is not welldefined. The tool accurately defines included angles of 45 and 90 aswell as a straight angle of I80". In this manner, the apex of a 45corner as well as the apex ofa 90 corner and any point along a straightedge ofa workpiece may be located. Of course, if it is desired toutilize the tool in conjunction with angles other than 45 and 90, thetool may be especially constructed accordingly. However, the tool orgauge illustrated and described hereinafter has been specificallydesigned to locate the apex edges of 45 and 90 corners on workpieces.

The main object of this invention is to provide a tool whereby any pointalong a straight line or the apex edge of at least two different anglecorners may be precisely located.

Another object of this invention, in accordance with the immediatelypreceding object, is to provide a tool that may be accurately utilizedby even unskilled workmen.

Yet another object of this invention is to provide a tool in accordancewith the preceding objects having no moving parts.

A final object of this invention to be specifically enumerated herein isto provide a tool which will conform to conventional forms inmanufacture, be of simple construction and easy to use so as to providea device that will be economically feasible, long lasting and relativelytrouble free in operation.

These together with other objects and advantages which will becomesubsequently apparent reside in the details of construction andoperation as more fully hereinafter described and claimed, referencebeing had to the accompanying drawings forming a part hereof, whereinlike numerals refer to like parts throughout, and in which:

FIG. 1 is a perspective view of the tool;

FIG. 2 is an enlarged vertical sectional view taken substantially fromthe plane indicated by the section line 2-2 of FIG. 1;

FIG. 3 is an enlarged sectional view taken substantially from the planeindicated by the section line 3-3 of FIG. 1;

FIG. 4 is a plan view of the tool in use locating the corner edge of aright angle corner on a workpiece;

FIG. 5 is a plan view of the tool being utilized to locate the corneredge on a 45 corner of a workpiece; and

FIG. 6 is a plan view of the tool being used to locate a given pointalong a straight side or edge of a workpiece.

Referring now more specifically to the drawings, the numeral 10generally designates the tool of the instant invention which includes acylindrical disc shaped body 12 having planar upper and lower surfaces14 and 16. The surfaces 14 and 16 are parallel and the periphery of thebody 12 is defined by a continuous cylindrical side surface 18, theupper and lower peripheral edges of the body 12 being chamfered as at 20and 21.

The body 12 further includes a diametric slot 22 formed in its uppersurface including parallel side walls 24 and 26 and a partialcylindrical upwardly opening bottom wall or surface 28. The center ofthe body 12 is provided with a cylindrical bore 30 whose upper and lowerends are flared as at 32 and 34 and the upper end of the bore 30 opensupwardly into the center of the bottom of the groove 22 while the lowerend of the bore 30 opens downwardly through the lower surface 16 of thebody 12.

The body 12 has a first pair of bores 36 and 38 formed therein onopposite sides of the bore 30 paralleling the latter and a diametricplane of the center bore 30 extending centrally through the slot orgroove 22 is tangent with corresponding sides of the bores 36 and 38,the latter having cylindrical abutment pins 40 and 42 secured thereinand projecting from the lower surface 16 of the body 12. In addition,the body 12 has a third bore 44 of the same diameter as the bores 36 and38 formed therein and an abutment pin 46 is secured in the bore 44 andalso projects downwardly from the lower surface 16 of the body 12.Finally, a small diameter bore 48 is formed through the body 12 and hasa small abutment pin 50 secured therein. The pins 40, 42, 46and 50parallel each other and are cylindrical. Further, the pin 50 alsoprojects downwardly below the lower surface 16 of the body 12 and ispositioned between the pin 46 and the bore 30.

With attention now invited more specifically to FIG. 5 of the drawings,it may be seen that a radial plane of the bore 30 tangent to theright-hand sides of the pins 46 and 50 is angularly displaced 45relative to a radial plane of the bore 30 tangent to the adjacent sideof the abutment pin 40. Further, with attention invited morespecifically to FIG. 4 of the drawings, it may be seen that a radialplane of the bore 30 tangent to the lefthand sides of the pins 46 and 50is angularly displaced relative to a radial plane of the bore 30 tangentto the adjacent side of the pin 42.

Finally, with attention invited more specifically to FIG. 6 of thedrawings, it may be seen that the upper sides of the pins 40 and 42 aredisposed along a diametric plane of the bore 30 extending centrallythrough and longitudinally of the groove 22.

Accordingly, if it is desired to locate the apex edge of a 45 corner ofa workpiece such as the workpiece 54 in FIG. 5, the guage or tool 10 ispositioned as illustrated in FIG. 5 with the abutment pin 40 against afirst side 56 of the workpiece and the pins 46 and 50 against a secondside 58 of the workpiece. With the tool and workpiece 54 thuspositioned, the apex edge of the 45 corner of the workpiece 54 definedat the juncture of the sides 56 and 58 will coincide with the centeraxis of the bore 30. In addition, with attention now invited morespecifically to FIG. 4, if the apex edge of a 90 corner of a workpiece60 defined by the juncture of adjacent sides 62 and 64 of the workpiece60 is to be located, the tool 10 is positioned relative to the workpiece60 in the manner illustrated in FIG. 4 of the drawings with the side 62abutted against the pins 46 and 50 and the side 64 abutted against thepin 42. When thus positioned, the tool 10 will be located relative tothe workpiece 60 so that the axis of the bore 30 coincides with the apexedge of the 90 corner defined at the juncture of the sides or surfaces62 and 64 of the workpiece 60. i

With attention now invited more specifically to FIG. 6, if a givenlocation or point of a planar surface 66 of a workpiece such as theworkpiece 68 illustrated in FlG. 6 is to be located, the side or surface66 is abutted against the pins 40 and 42 on the sides thereof remotefrom the pin 46 and when thus positioned the tool 10 will have thecenter axis of its bore 30 as well as slot 22 disposed in the plane ofthe side or surface of the workpiece 68.

The pin 50 is of course provided to properly angularly orient theworkpieces 54 and 60 relative to the pins 40 and 46 as well as thecenter axis of the bore 30 and the pins 42 and 46 as well as the centeraxis of the bore 30 respectively.

The foregoing is considered as illustrative only of the principles ofthe invention. Further, since numerous modifications and changes willreadily occur to those skilled in the art, it is not desired to limitthe invention to the exact construction and operation shown anddescribed, and accordingly all suitable modifications and equivalentsmay be resorted to, falling within the scope of the invention.

What is claimed as new is as follows:

1. A workpiece edge and corner locating tool comprising a body holding afirst surface and including means defining a reference axis, a pair ofabutment members projecting outwardly of said surface at points spacedabout said axis, adjacent side surfaces of said abutment members lyingin radial planes of said axis and angularly disposed relative to eachother a predetermined amount, and a third abutment member spacedgenerally radially of said axis and from one abutment member of saidpair of abutment members and including a side surface lying in theradial plane in which the side surface of said one abutment member isdisposed and facing in the same direction as the last mentioned sidesurface, said body including a fourth abutment member projectingoutwardly of said first surface at a point spaced about said axis fromsaid one abutment member and disposed on the side thereof remote fromthe other abutment member of said pair of abutment members, said fourthabutment member including a side surface generally opposing said otherand third abutment members lying in a third radial plane of said axisand said other and third abutment members including side surfacesgenerally opposing said fourth abutment member lying in a fourth radialplane of said axis angularly displaced a predetermined amount relativeto said third radial plane.

2. The combination of claim 1 wherein said first and fourth abutmentmembers include side surfaces facing away from said second abutmentmember lying in a diametric plane of said axis.

3. The combination of claim 2 wherein said third abutment member isspaced from said second abutment member radially inwardly of said axis.

4. The combination of claim 2 wherein said body is cylindrical with itscenter axis coinciding with said reference axis.

5. The combination of claim 4 wherein said reference axis comprises alongitudinal center axis of a bore formed through said body.

6. The combination of claim 2 wherein said side surfaces of saidabutment members comprise partial cylindrical surfaces generated aboutaxes paralleling said reference axis.

7. A workpiece edge and corner locating tool comprising a body having afirst surface and including means defining a reference axis, first,second and third abutment members projecting outwardly of said firstsurface at points spaced from and about said axis and disposed in asector of said axis, said first and second abutment members includingadjacent side surfaces lying in first and second radial planes,respectively, of said axis and said second and third abutment membersincluding adjacent side surfaces lying in third and fourth radialplanes, respectively, of said axis and a fourth abutment memberprojecting outwardly of said first surface in position spaced radiallyof said axis and from said second abutment member, said fourth abutmentmember including opposite side surfaces lying in said second and thirdplanes.

8. The combination of claim 7 wherein said first and third abutmentmembers include side surfaces remote from the first mentioned sidesurfaces thereof lying in a diametric plane of said axis.

9. The combination of claim 7 wherein said reference axis comprises alongitudinal center axis of a bore formed through said body.

10. The combination of claim 9 wherein said body includes a secondsurface remote from said first surface, said second surface having agroove formed therein disposed on a diametric plane of said referenceaxis.

11. The combination of claim 10 wherein said first and third abutmentmembers include side surfaces remote from the first mentioned sidesurfaces thereof lying in a diametric plane of said axis.

12. The combination of claim 11 wherein said diametric planes coincide.

1. A workpiece edge and corner locating tool comprising a body holding afirst surface and including means defining a reference axis, a pair ofabutment members projecting outwardly of said surface at points spacedabout said axis, adjacent side surfaces of said abutment members lyingin radial planes of said axis and angularly disposed relative to eachother a predetermined amount, and a third abutment member spacedgenerally radially of said axis and from one abutment member of saidpair of abutment members and including a side surface lying in theradial plane in which the side surface of said one abutment member isdisposed and facing in the same direction as the last mentioned sidesurface, said body including a fourth abutment member projectingoutwardly of said first surface at a point spaced about said axis fromsaid one abutment member and disposed on the side thereof remote fromthe other abutment member of said pair of abutment members, said fourthabutment member including a side surface generally opposing said otherand third abutment members lying in a third radial plane of said axisand said other and third abutment members including side surfacesgenerally opposing said fourth abutment member lying in a fourth radialplane of said axis angularly displaced a predetermined amount relativeto said third radial plane.
 2. The combination of claim 1 wherein saidfirst and fourth abutment members include side surfaces facing away fromsaid second abutment member lying in a diametric plane of said axis. 3.The combination of claim 2 wherein said third abutment member is spacedfrom said second abutment member radially inwardly of said axis.
 4. Thecombination of claim 2 wherein said body is cylindrical with its centeraxis coinciding with said reference axis.
 5. The combination of claim 4wherein said reference axis comprises a longitudinal center axis of abore formed through said body.
 6. The combination of claim 2 whereinsaid side surfaces of said abutment members comprise partial cylindricalsurfaces generated about axes paralleling said reference axis.
 7. Aworkpiece edge and corner locating tool comprising a body having a firstsurface and including means defining a reference axis, first, second andthird abutment members projecting outwardly of said first surface atpoints spaced from and about said axis and disposed in a 180* sector ofsaid axis, said first and second abutment members including adjacentside surfaces lying in first and second radial planes, respectively, ofsaid axis and said second and third abutment members including adjacentside surfaces lying in third and fourth radial planes, respectively, ofsaid axis and a fourth abutment member projecting outwardly of saidfirst surface in position spaced radially of said axis and from saidsecond abutment member, said fourth abutment member including oppositeside surfaces lying in said second and third planes.
 8. The combinationof claim 7 wherein said first and third abutment members include sidesurfaces remote from the first mentioned side surfaces thereof lying ina diametric plane of said axis.
 9. The combination of claim 7 whereinsaid reference axis comprises a longitudinal center axis of a boreformed through said body.
 10. The combination of claim 9 wherein saidbody includes a second surface remote from said first surface, saidsecond surface having a groove formed therein disposed on a diametricplane of said reference axis.
 11. The combination of claim 10 whereinsaid first and third abutment members include side surfaces remote fromthe first mentioned side surfaces thereof lying in a diametric plane ofsaid axis.
 12. The combination of claim 11 wherein said diametric planescoincide.